vnc: added initial websocket protocol support

This patch adds basic Websocket Protocol version 13 - RFC 6455 - support
to QEMU VNC. Binary encoding support on the client side is mandatory.

Because of the GnuTLS requirement the Websockets implementation is
optional (--enable-vnc-ws).

To activate Websocket support the VNC option "websocket"is used, for
example "-vnc :0,websocket".
The listen port for Websocket connections is (5700 + display) so if
QEMU VNC is started with :0 the Websocket port would be 5700.
As an alternative the Websocket port could be manually specified by
using ",websocket=<port>" instead.

Parts of the implementation base on Anthony Liguori's QEMU Websocket
patch from 2010 and on Joel Martin's LibVNC Websocket implementation.

Signed-off-by: Tim Hardeck <thardeck@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Tim Hardeck 2013-01-21 11:04:44 +01:00 committed by Anthony Liguori
parent 32ed26808d
commit 7536ee4bc3
7 changed files with 591 additions and 21 deletions

27
configure vendored
View file

@ -158,6 +158,7 @@ vnc_tls=""
vnc_sasl=""
vnc_jpeg=""
vnc_png=""
vnc_ws=""
xen=""
xen_ctrl_version=""
xen_pci_passthrough=""
@ -724,6 +725,10 @@ for opt do
;;
--enable-vnc-png) vnc_png="yes"
;;
--disable-vnc-ws) vnc_ws="no"
;;
--enable-vnc-ws) vnc_ws="yes"
;;
--disable-slirp) slirp="no"
;;
--disable-uuid) uuid="no"
@ -1069,6 +1074,8 @@ echo " --disable-vnc-jpeg disable JPEG lossy compression for VNC server"
echo " --enable-vnc-jpeg enable JPEG lossy compression for VNC server"
echo " --disable-vnc-png disable PNG compression for VNC server (default)"
echo " --enable-vnc-png enable PNG compression for VNC server"
echo " --disable-vnc-ws disable Websockets support for VNC server"
echo " --enable-vnc-ws enable Websockets support for VNC server"
echo " --disable-curses disable curses output"
echo " --enable-curses enable curses output"
echo " --disable-curl disable curl connectivity"
@ -1712,8 +1719,8 @@ EOF
fi
##########################################
# VNC TLS detection
if test "$vnc" = "yes" -a "$vnc_tls" != "no" ; then
# VNC TLS/WS detection
if test "$vnc" = "yes" -a \( "$vnc_tls" != "no" -o "$vnc_ws" != "no" \) ; then
cat > $TMPC <<EOF
#include <gnutls/gnutls.h>
int main(void) { gnutls_session_t s; gnutls_init(&s, GNUTLS_SERVER); return 0; }
@ -1721,14 +1728,23 @@ EOF
vnc_tls_cflags=`$pkg_config --cflags gnutls 2> /dev/null`
vnc_tls_libs=`$pkg_config --libs gnutls 2> /dev/null`
if compile_prog "$vnc_tls_cflags" "$vnc_tls_libs" ; then
vnc_tls=yes
if test "$vnc_tls" != "no" ; then
vnc_tls=yes
fi
if test "$vnc_ws" != "no" ; then
vnc_ws=yes
fi
libs_softmmu="$vnc_tls_libs $libs_softmmu"
QEMU_CFLAGS="$QEMU_CFLAGS $vnc_tls_cflags"
else
if test "$vnc_tls" = "yes" ; then
feature_not_found "vnc-tls"
fi
if test "$vnc_ws" = "yes" ; then
feature_not_found "vnc-ws"
fi
vnc_tls=no
vnc_ws=no
fi
fi
@ -3283,6 +3299,7 @@ if test "$vnc" = "yes" ; then
echo "VNC SASL support $vnc_sasl"
echo "VNC JPEG support $vnc_jpeg"
echo "VNC PNG support $vnc_png"
echo "VNC WS support $vnc_ws"
fi
if test -n "$sparc_cpu"; then
echo "Target Sparc Arch $sparc_cpu"
@ -3461,6 +3478,10 @@ fi
if test "$vnc_png" = "yes" ; then
echo "CONFIG_VNC_PNG=y" >> $config_host_mak
fi
if test "$vnc_ws" = "yes" ; then
echo "CONFIG_VNC_WS=y" >> $config_host_mak
echo "VNC_WS_CFLAGS=$vnc_ws_cflags" >> $config_host_mak
fi
if test "$fnmatch" = "yes" ; then
echo "CONFIG_FNMATCH=y" >> $config_host_mak
fi